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CURRENT AND NON-CURRENT EMPLOYEE BENEFITS - Personnel expenses (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
CLP ($)
employee
Dec. 31, 2018
CLP ($)
employee
Dec. 31, 2017
CLP ($)
employee
Personnel expenses      
Wages and salaries $ 194,740,646 $ 195,162,903 $ 215,715,214
Employee benefits 58,005,213 50,254,164 50,127,117
Severance benefits 6,987,184 5,535,410 7,410,936
Other personnel expenses 13,389,967 16,014,364 14,205,259
Total $ 273,123,010 $ 266,966,841 $ 287,458,526
Number of employees      
Number of employees | employee 16,167 16,098 15,924
Average number of employees | employee 15,444 15,364 15,364